Perhaps you should try some spelling variations:
hai chau » lai chau, ha chau, hat chau
duc van » duc va, duc tan, duc manh
dai hau » dai han, dai hai, dai huu
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
luc van » luoc van, luu van, luc va
va cam » va cham, va cac, va cao

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 ly nang xa hoi. hieu va cam ((luc van) OR (duc van)) nhanh ((dai hau) or (hai chau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang xa hoi. hieu va cam ((luc van) OR (duc van)) nhanh ((dai hau) OR (hai chau)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang xa hoi. hieu va cam ((luc van) OR (duc van)) nhanh ((dai hau) or (hai chau)) treo".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang xa hoi. hieu va cam ((luc van) OR (duc van)) nhanh ((dai hau) or (hai chau)) treo*.