Perhaps you should try some spelling variations:
dua tren » dung tren
nang tai » hang tai, tang tai, sang tai
chat cua » nhat cua, chat va, chat huu
cham cuu » cap cuu
sach ly » sach y, sach lo, sach ty
du tren » dau tren, duc tren, tu tren
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
tai hoi » tai khoi, dai hoi, tai hai
ly nang » ky nang, ly hang, ly vang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi ((du tren) OR (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang tai hoi. lieu va ((cham cuu) OR (chat cua)) va hanh vi ((du tren) OR (dua tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi ((du tren) OR (dua tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi ((du tren) OR (dua tren))*.