Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
cau tren » dau tren, cau treo, cau tieng
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cu tren » tu tren, dua tren
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
qua cau » quan cau, qua cac, qua ca
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
ca tren » la tren, co tren, xa tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang van hoi. hieu qua cau truc va hanh va ((((cau tren) OR (cu tren))) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang van hoi. hieu qua cau truc va hanh va ((((cau tren) OR (cu tren))) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang van hoi. hieu qua cau truc va hanh va ((((cau tren) OR (cu tren))) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang van hoi. hieu qua cau truc va hanh va ((((cau tren) OR (cu tren))) or (ca tren))*.