Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cham xuc » cam xuc, chat xuc, cham soc
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va danh, ban hanh
luy tre » luyen tre
vi luy » vi lua, vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ky) or (sach y)) nang cao hoi. hieu ve cham xuc ((va hanh) or (va thanh)) vi luy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ky) OR (sach y)) nang cao hoi. hieu ve cham xuc ((va hanh) OR (va thanh)) vi luy tre.
• Adding a wildcard symbol may retrieve word variants: doc ((sach ky) or (sach y)) nang cao hoi. hieu ve cham xuc ((va hanh) or (va thanh)) vi luy tre*.