Perhaps you should try some spelling variations:
tu tieng » luc tieng, tu tuong, tu trong
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cam tu » cam thu, nam tu, dam tu
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
va tu » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sac ky)) nang xa hoi. hieu ve cam tu ((va danh) OR (va dinh)) va tu tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang xa hoi. hieu ve cam tu ((va danh) OR (va dinh)) va tu tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) nang xa hoi. hieu ve cam tu ((va danh) OR (va dinh)) va tu tieng".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) nang xa hoi. hieu ve cam tu ((va danh) OR (va dinh)) va tu tieng*.