Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
cau tren » dau tren, ca tren, cau treo
danh dai » danh dau, danh di, danh sai
hieu cao » chieu cao, hieu cac, hieu ca
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
cu tren » tu tren, dua tren

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

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